| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef ASH_WM_WORKSPACE_WINDOW_RESIZER_H_ |
| #define ASH_WM_WORKSPACE_WINDOW_RESIZER_H_ |
| |
| #include <vector> |
| |
| #include "ash/wm/window_resizer.h" |
| #include "ash/wm/workspace/magnetism_matcher.h" |
| #include "base/compiler_specific.h" |
| #include "base/gtest_prod_util.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/memory/weak_ptr.h" |
| #include "ui/aura/window_tracker.h" |
| |
| namespace ash { |
| class DockedWindowLayoutManager; |
| class PhantomWindowController; |
| class TwoStepEdgeCycler; |
| class WindowSize; |
| |
| namespace wm { |
| class WindowState; |
| } |
| |
| // WindowResizer implementation for workspaces. This enforces that windows are |
| // not allowed to vertically move or resize outside of the work area. As windows |
| // are moved outside the work area they are shrunk. We remember the height of |
| // the window before it was moved so that if the window is again moved up we |
| // attempt to restore the old height. |
| class ASH_EXPORT WorkspaceWindowResizer : public WindowResizer { |
| public: |
| // When dragging an attached window this is the min size we'll make sure is |
| // visible. In the vertical direction we take the max of this and that from |
| // the delegate. |
| static const int kMinOnscreenSize; |
| |
| // Min height we'll force on screen when dragging the caption. |
| // TODO: this should come from a property on the window. |
| static const int kMinOnscreenHeight; |
| |
| // Snap region when dragging close to the edges. That is, as the window gets |
| // this close to an edge of the screen it snaps to the edge. |
| static const int kScreenEdgeInset; |
| |
| // Distance in pixels that the cursor must move past an edge for a window |
| // to move or resize beyond that edge. |
| static const int kStickyDistancePixels; |
| |
| virtual ~WorkspaceWindowResizer(); |
| |
| static WorkspaceWindowResizer* Create( |
| wm::WindowState* window_state, |
| const std::vector<aura::Window*>& attached_windows); |
| |
| // WindowResizer: |
| virtual void Drag(const gfx::Point& location_in_parent, |
| int event_flags) OVERRIDE; |
| virtual void CompleteDrag() OVERRIDE; |
| virtual void RevertDrag() OVERRIDE; |
| |
| private: |
| WorkspaceWindowResizer(wm::WindowState* window_state, |
| const std::vector<aura::Window*>& attached_windows); |
| |
| private: |
| friend class WorkspaceWindowResizerTest; |
| |
| // The edge to which the window should be snapped at the end of the drag. |
| enum SnapType { |
| SNAP_LEFT, |
| SNAP_RIGHT, |
| SNAP_NONE |
| }; |
| |
| // Lays out the attached windows. |bounds| is the bounds of the main window. |
| void LayoutAttachedWindows(gfx::Rect* bounds); |
| |
| // Calculates the new sizes of the attached windows, given that the main |
| // window has been resized (along the primary axis) by |delta|. |
| // |available_size| is the maximum length of the space that the attached |
| // windows are allowed to occupy (ie: the distance between the right/bottom |
| // edge of the primary window and the right/bottom of the desktop area). |
| // Populates |sizes| with the desired sizes of the attached windows, and |
| // returns the number of pixels that couldn't be allocated to the attached |
| // windows (due to min/max size constraints). |
| // Note the return value can be positive or negative, a negative value |
| // indicating that that many pixels couldn't be removed from the attached |
| // windows. |
| int CalculateAttachedSizes( |
| int delta, |
| int available_size, |
| std::vector<int>* sizes) const; |
| |
| // Divides |amount| evenly between |sizes|. If |amount| is negative it |
| // indicates how many pixels |sizes| should be shrunk by. |
| // Returns how many pixels failed to be allocated/removed from |sizes|. |
| int GrowFairly(int amount, std::vector<WindowSize>& sizes) const; |
| |
| // Calculate the ratio of pixels that each WindowSize in |sizes| should |
| // receive when growing or shrinking. |
| void CalculateGrowthRatios(const std::vector<WindowSize*>& sizes, |
| std::vector<float>* out_ratios) const; |
| |
| // Adds a WindowSize to |sizes| for each attached window. |
| void CreateBucketsForAttached(std::vector<WindowSize>* sizes) const; |
| |
| // If possible snaps the window to a neary window. Updates |bounds| if there |
| // was a close enough window. |
| void MagneticallySnapToOtherWindows(gfx::Rect* bounds); |
| |
| // If possible snaps the resize to a neary window. Updates |bounds| if there |
| // was a close enough window. |
| void MagneticallySnapResizeToOtherWindows(gfx::Rect* bounds); |
| |
| // Finds the neareset window to magentically snap to. Updates |
| // |magnetism_window_| and |magnetism_edge_| appropriately. |edges| is a |
| // bitmask of the MagnetismEdges to match again. Returns true if a match is |
| // found. |
| bool UpdateMagnetismWindow(const gfx::Rect& bounds, uint32 edges); |
| |
| // Adjusts the bounds of the window: magnetically snapping, ensuring the |
| // window has enough on screen... |snap_size| is the distance from an edge of |
| // the work area before the window is snapped. A value of 0 results in no |
| // snapping. |
| void AdjustBoundsForMainWindow(int snap_size, gfx::Rect* bounds); |
| |
| // Stick the window bounds to the work area during a move. |
| bool StickToWorkAreaOnMove(const gfx::Rect& work_area, |
| int sticky_size, |
| gfx::Rect* bounds) const; |
| |
| // Stick the window bounds to the work area during a resize. |
| void StickToWorkAreaOnResize(const gfx::Rect& work_area, |
| int sticky_size, |
| gfx::Rect* bounds) const; |
| |
| // Returns a coordinate along the primary axis. Used to share code for |
| // left/right multi window resize and top/bottom resize. |
| int PrimaryAxisSize(const gfx::Size& size) const; |
| int PrimaryAxisCoordinate(int x, int y) const; |
| |
| // Updates the bounds of the phantom window for window snapping. |
| void UpdateSnapPhantomWindow(const gfx::Point& location, |
| const gfx::Rect& bounds); |
| |
| // Restacks the windows z-order position so that one of the windows is at the |
| // top of the z-order, and the rest directly underneath it. |
| void RestackWindows(); |
| |
| // Returns the edge to which the window should be snapped to if the user does |
| // no more dragging. SNAP_NONE is returned if the window should not be |
| // snapped. |
| SnapType GetSnapType(const gfx::Point& location) const; |
| |
| // Returns true if |bounds_in_parent| are valid bounds for snapped state type |
| // |snapped_type|. |
| bool AreBoundsValidSnappedBounds(wm::WindowStateType snapped_type, |
| const gfx::Rect& bounds_in_parent) const; |
| |
| // Docks or undocks the dragged window. |
| void SetDraggedWindowDocked(bool should_dock); |
| |
| wm::WindowState* window_state() { return window_state_; } |
| |
| const std::vector<aura::Window*> attached_windows_; |
| |
| bool did_lock_cursor_; |
| |
| // Set to true once Drag() is invoked and the bounds of the window change. |
| bool did_move_or_resize_; |
| |
| // True if the window initially had |bounds_changed_by_user_| set in state. |
| bool initial_bounds_changed_by_user_; |
| |
| // The initial size of each of the windows in |attached_windows_| along the |
| // primary axis. |
| std::vector<int> initial_size_; |
| |
| // Sum of the minimum sizes of the attached windows. |
| int total_min_; |
| |
| // Sum of the sizes in |initial_size_|. |
| int total_initial_size_; |
| |
| // Gives a previews of where the the window will end up. Only used if there |
| // is a grid and the caption is being dragged. |
| scoped_ptr<PhantomWindowController> snap_phantom_window_controller_; |
| |
| // Used to determine whether the window should be snapped or docked when |
| // the user drags a window to the edge of the screen. |
| scoped_ptr<TwoStepEdgeCycler> edge_cycler_; |
| |
| // The edge to which the window should be snapped to at the end of the drag. |
| SnapType snap_type_; |
| |
| // Number of mouse moves since the last bounds change. Only used for phantom |
| // placement to track when the mouse is moved while pushed against the edge of |
| // the screen. |
| int num_mouse_moves_since_bounds_change_; |
| |
| // The mouse location passed to Drag(). |
| gfx::Point last_mouse_location_; |
| |
| // Window the drag has magnetically attached to. |
| aura::Window* magnetism_window_; |
| |
| // Used to verify |magnetism_window_| is still valid. |
| aura::WindowTracker window_tracker_; |
| |
| // If |magnetism_window_| is non-NULL this indicates how the two windows |
| // should attach. |
| MatchedEdge magnetism_edge_; |
| |
| // Dock container window layout manager. |
| DockedWindowLayoutManager* dock_layout_; |
| |
| // Used to determine if this has been deleted during a drag such as when a tab |
| // gets dragged into another browser window. |
| base::WeakPtrFactory<WorkspaceWindowResizer> weak_ptr_factory_; |
| |
| // Current instance for use by the WorkspaceWindowResizerTest. |
| static WorkspaceWindowResizer* instance_; |
| |
| DISALLOW_COPY_AND_ASSIGN(WorkspaceWindowResizer); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_WM_WORKSPACE_WINDOW_RESIZER_H_ |